最后发方将会不计时，并且由丢失的或损坏的一帧开始，重发所有未接收的帧。
The sender eventually will time out and retransmit all unacknowledged frames, beginning with the lost or damaged one.
最后发方将会不计时，并且由丢失的或损坏的一帧开始，重发所有未接收的帧。
The sender eventually will time out and retransmit all unacknowledged frames, beginning with the lost or damaged one.
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